Nuclear Security Summit
History

Date
Country
City
Host leader
April 12–13, 2010
United States
Washington, D.C.
Barack Obama
March 26–27, 2012
South Korea
Seoul
Lee Myung-bak
March 24–25, 2014
Netherlands
The Hague
Mark Rutte
March 31–April 1, 2016
United States
Washington, D.C.
Barack Obama

Question: Where and when was the first Nuclear Security Summit held?
Answer: The first summit was held in Washington, D.C., United States, on April 12–13, 2010.